bonjour,lorsque j'essaye d'exécuter mon projet j'aurai cette erreur :
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Grave: Erreur lors de la configuration de la classe d'écoute de l'application (application listener) org.springframework.web.context.ContextLoaderListener
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
	at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:529)
	at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:511)
	at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:139)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4888)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
et aussi voila mon fichier pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <artifactId>logique_mav</artifactId>
        <groupId>com.st2i</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
 
 
    <artifactId>Presentation</artifactId>
 
    <packaging>war</packaging>
 
    <name>Presentation</name>
 
    <properties>
        <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
    	<groupId>com.sun.faces</groupId>
    	<artifactId>jsf-api</artifactId>
    	<version>2.2.6</version>
    </dependency>
    <dependency>
    	<groupId>com.sun.faces</groupId>
    	<artifactId>jsf-impl</artifactId>
    	<version>2.2.6</version>
    </dependency>
    <dependency>
    	<groupId>taglibs</groupId>
    	<artifactId>standard</artifactId>
    	<version>1.1.2</version>
    </dependency>
    <dependency>
    	<groupId>javax.servlet</groupId>
    	<artifactId>jstl</artifactId>
    	<version>1.2</version>
    </dependency>
    <dependency>
    	<groupId>org.primefaces</groupId>
    	<artifactId>primefaces</artifactId>
    	<version>4.0</version>
    </dependency>
    <dependency>
    	<groupId>org.springframework</groupId>
    	<artifactId>spring-webmvc</artifactId>
    	<version>3.1.2.RELEASE</version>
    </dependency>
    <dependency>
    	<groupId>commons-logging</groupId>
    	<artifactId>commons-logging-api</artifactId>
    	<version>1.1</version>
    </dependency>
    <dependency>
    	<groupId>commons-logging</groupId>
    	<artifactId>commons-logging</artifactId>
    	<version>1.1.1</version>
    </dependency>
 
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
        </dependency>
 
        <dependency>
        	<groupId>org.jboss.spec.javax.transaction</groupId>
        	<artifactId>jboss-transaction-api_1.1_spec</artifactId>
        	<version>1.0.1.Final</version>
        </dependency>
        <dependency>
        <groupId>org.primefaces.extensions</groupId>
        <artifactId>all-themes</artifactId>
        <version>1.0.8</version>
        <type>pom</type>
        </dependency>
        <dependency>
        	<groupId>com.st2i</groupId>
        	<artifactId>Service</artifactId>
        	<version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
        	<groupId>javax</groupId>
        	<artifactId>javaee-api</artifactId>
        	<version>7.0</version>
        </dependency>
        <dependency>
        	<groupId>org.springframework</groupId>
        	<artifactId>spring-web</artifactId>
        	<version>3.1.2.RELEASE</version>
        </dependency>
  </dependencies>
 
 
    <build>
 
        <plugins>
             <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                    <compilerArguments>
                        <endorseddirs>${endorsed.dir}</endorseddirs>
                    </compilerArguments>
                </configuration>
            </plugin> 
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.1.1</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
 
    </build>
 
</project>
et voila le fichier web.xml
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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	id="WebApp_ID" version="2.5">
	<display-name>JSFSample</display-name>
 
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/applicationContext.xml</param-value>
	</context-param>
 
	<context-param>
		<param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
		<param-value>true</param-value>
	</context-param>
<!-- 
	<filter>
		<filter-name>springSecurityFilterChain</filter-name>
		<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>springSecurityFilterChain</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
 
 -->
	<servlet>
		<servlet-name>Faces Servlet</servlet-name>
		<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>Faces Servlet</servlet-name>
		<url-pattern>/faces/*</url-pattern>
	</servlet-mapping>
	<welcome-file-list>
		<welcome-file>layout.xhtml</welcome-file>
	</welcome-file-list>
	<!-- 
	<error-page>
        <exception-type>org.springframework.security.access.AccessDeniedException</exception-type>
        <location>/faces/login.xhtml</location>
	</error-page>
	 -->
 
</web-app>
et merci d'avance.